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Author
Clapp, Frederick G. (Frederick Gardner), 1879-1944. (1)
Subject
Carboniferous - Greene formation; Washington formation; Monongahela formation; Conemaugh formation (1)
Geology -- Pennsylvania -- Greene County -- Maps (1)
Geology -- Pennsylvania -- Washington County -- Maps (1)Geology -- United States --Maps (1)
Neogene - Carmichaels formation (1)
... View MoreDate Issued1907 (1)TypeBook (1)Image (1)
Map (1)
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Yes (1)